RUMORED BUZZ ON GARAGE

I think it is a means to gather more taxes from me for your "finished" garage (living Place) , and not a "authorized"code need. I am a mechanic And that i use the uncovered studs to install shelving & devices. The permit I applied for & received was for "lights & storage". There's no plumbing or HVAC. Would I be Erroneous to "press" The difficulty